drm/radeon/kms: Fix AGP support for R600/RV770 family (v2)

For AGP to work unmapped access must cover VRAM & AGP as
AGP is treated like VRAM by the GPU (ie physical address).
This patch properly setup the virtual memory system aperture
to cover AGP if AGP is enabled. It seems that there is memory
corruption after resume when using AGP (RV770 seems unaffected
thought). Version 2 just fix merge issue with updated AGP
fallback patch.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 92 insertions, 25 deletions

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 2cef638fa06..6b43a95a5fb 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -65,16 +65,11 @@ MODULE_FIRMWARE("radeon/RV710_me.bin");
 
 int r600_debugfs_mc_info_init(struct radeon_device *rdev);
 
-/* This files gather functions specifics to:
- * r600,rv610,rv630,rv620,rv635,rv670
- *
- * Some of these functions might be used by newer ASICs.
- */
+/* r600,rv610,rv630,rv620,rv635,rv670 */
 int r600_mc_wait_for_idle(struct radeon_device *rdev);
 void r600_gpu_init(struct radeon_device *rdev);
 void r600_fini(struct radeon_device *rdev);
 
-
 /*
  * R600 PCIE GART
  */
@@ -168,7 +163,7 @@ int r600_pcie_gart_enable(struct radeon_device *rdev)
 	WREG32(MC_VM_L1_TLB_MCB_RD_SEM_CNTL, tmp | ENABLE_SEMAPHORE_MODE);
 	WREG32(MC_VM_L1_TLB_MCB_WR_SEM_CNTL, tmp | ENABLE_SEMAPHORE_MODE);
 	WREG32(VM_CONTEXT0_PAGE_TABLE_START_ADDR, rdev->mc.gtt_start >> 12);
-	WREG32(VM_CONTEXT0_PAGE_TABLE_END_ADDR, (rdev->mc.gtt_end - 1) >> 12);
+	WREG32(VM_CONTEXT0_PAGE_TABLE_END_ADDR, rdev->mc.gtt_end >> 12);
 	WREG32(VM_CONTEXT0_PAGE_TABLE_BASE_ADDR, rdev->gart.table_addr >> 12);
 	WREG32(VM_CONTEXT0_CNTL, ENABLE_CONTEXT | PAGE_TABLE_DEPTH(0) |
 				RANGE_PROTECTION_FAULT_ENABLE_DEFAULT);
@@ -225,6 +220,40 @@ void r600_pcie_gart_fini(struct radeon_device *rdev)
 	radeon_gart_fini(rdev);
 }
 
+void r600_agp_enable(struct radeon_device *rdev)
+{
+	u32 tmp;
+	int i;
+
+	/* Setup L2 cache */
+	WREG32(VM_L2_CNTL, ENABLE_L2_CACHE | ENABLE_L2_FRAGMENT_PROCESSING |
+				ENABLE_L2_PTE_CACHE_LRU_UPDATE_BY_WRITE |
+				EFFECTIVE_L2_QUEUE_SIZE(7));
+	WREG32(VM_L2_CNTL2, 0);
+	WREG32(VM_L2_CNTL3, BANK_SELECT_0(0) | BANK_SELECT_1(1));
+	/* Setup TLB control */
+	tmp = ENABLE_L1_TLB | ENABLE_L1_FRAGMENT_PROCESSING |
+		SYSTEM_ACCESS_MODE_NOT_IN_SYS |
+		EFFECTIVE_L1_TLB_SIZE(5) | EFFECTIVE_L1_QUEUE_SIZE(5) |
+		ENABLE_WAIT_L2_QUERY;
+	WREG32(MC_VM_L1_TLB_MCB_RD_SYS_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCB_WR_SYS_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCB_RD_HDP_CNTL, tmp | ENABLE_L1_STRICT_ORDERING);
+	WREG32(MC_VM_L1_TLB_MCB_WR_HDP_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCD_RD_A_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCD_WR_A_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCD_RD_B_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCD_WR_B_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCB_RD_GFX_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCB_WR_GFX_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCB_RD_PDMA_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCB_WR_PDMA_CNTL, tmp);
+	WREG32(MC_VM_L1_TLB_MCB_RD_SEM_CNTL, tmp | ENABLE_SEMAPHORE_MODE);
+	WREG32(MC_VM_L1_TLB_MCB_WR_SEM_CNTL, tmp | ENABLE_SEMAPHORE_MODE);
+	for (i = 0; i < 7; i++)
+		WREG32(VM_CONTEXT0_CNTL + (i * 4), 0);
+}
+
 int r600_mc_wait_for_idle(struct radeon_device *rdev)
 {
 	unsigned i;
@@ -263,18 +292,34 @@ static void r600_mc_program(struct radeon_device *rdev)
 	/* Lockout access through VGA aperture (doesn't exist before R600) */
 	WREG32(VGA_HDP_CONTROL, VGA_MEMORY_DISABLE);
 	/* Update configuration */
-	WREG32(MC_VM_SYSTEM_APERTURE_LOW_ADDR, rdev->mc.vram_start >> 12);
-	WREG32(MC_VM_SYSTEM_APERTURE_HIGH_ADDR, (rdev->mc.vram_end - 1) >> 12);
+	if (rdev->flags & RADEON_IS_AGP) {
+		if (rdev->mc.vram_start < rdev->mc.gtt_start) {
+			/* VRAM before AGP */
+			WREG32(MC_VM_SYSTEM_APERTURE_LOW_ADDR,
+				rdev->mc.vram_start >> 12);
+			WREG32(MC_VM_SYSTEM_APERTURE_HIGH_ADDR,
+				rdev->mc.gtt_end >> 12);
+		} else {
+			/* VRAM after AGP */
+			WREG32(MC_VM_SYSTEM_APERTURE_LOW_ADDR,
+				rdev->mc.gtt_start >> 12);
+			WREG32(MC_VM_SYSTEM_APERTURE_HIGH_ADDR,
+				rdev->mc.vram_end >> 12);
+		}
+	} else {
+		WREG32(MC_VM_SYSTEM_APERTURE_LOW_ADDR, rdev->mc.vram_start >> 12);
+		WREG32(MC_VM_SYSTEM_APERTURE_HIGH_ADDR, rdev->mc.vram_end >> 12);
+	}
 	WREG32(MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR, 0);
-	tmp = (((rdev->mc.vram_end - 1) >> 24) & 0xFFFF) << 16;
+	tmp = ((rdev->mc.vram_end >> 24) & 0xFFFF) << 16;
 	tmp |= ((rdev->mc.vram_start >> 24) & 0xFFFF);
 	WREG32(MC_VM_FB_LOCATION, tmp);
 	WREG32(HDP_NONSURFACE_BASE, (rdev->mc.vram_start >> 8));
 	WREG32(HDP_NONSURFACE_INFO, (2 << 7));
-	WREG32(HDP_NONSURFACE_SIZE, (rdev->mc.mc_vram_size - 1) | 0x3FF);
+	WREG32(HDP_NONSURFACE_SIZE, rdev->mc.mc_vram_size | 0x3FF);
 	if (rdev->flags & RADEON_IS_AGP) {
-		WREG32(MC_VM_AGP_TOP, (rdev->mc.gtt_end - 1) >> 16);
-		WREG32(MC_VM_AGP_BOT, rdev->mc.gtt_start >> 16);
+		WREG32(MC_VM_AGP_TOP, rdev->mc.gtt_end >> 22);
+		WREG32(MC_VM_AGP_BOT, rdev->mc.gtt_start >> 22);
 		WREG32(MC_VM_AGP_BASE, rdev->mc.agp_base >> 22);
 	} else {
 		WREG32(MC_VM_AGP_BASE, 0);
@@ -390,9 +435,9 @@ int r600_mc_init(struct radeon_device *rdev)
 		}
 	}
 	rdev->mc.vram_start = rdev->mc.vram_location;
-	rdev->mc.vram_end = rdev->mc.vram_location + rdev->mc.mc_vram_size;
+	rdev->mc.vram_end = rdev->mc.vram_location + rdev->mc.mc_vram_size - 1;
 	rdev->mc.gtt_start = rdev->mc.gtt_location;
-	rdev->mc.gtt_end = rdev->mc.gtt_location + rdev->mc.gtt_size;
+	rdev->mc.gtt_end = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
 	/* FIXME: we should enforce default clock in case GPU is not in
 	 * default setup
 	 */
@@ -428,9 +473,13 @@ int r600_gpu_soft_reset(struct radeon_device *rdev)
 	u32 srbm_reset = 0;
 	u32 tmp;
 
-	dev_info(rdev->dev, "GPU softreset (R_008010_GRBM_STATUS=0x%08X "
-		"R_008014_GRBM_STATUS2=0x%08X)\n", RREG32(R_008010_GRBM_STATUS),
+	dev_info(rdev->dev, "GPU softreset \n");
+	dev_info(rdev->dev, "  R_008010_GRBM_STATUS=0x%08X\n",
+		RREG32(R_008010_GRBM_STATUS));
+	dev_info(rdev->dev, "  R_008014_GRBM_STATUS2=0x%08X\n",
 		RREG32(R_008014_GRBM_STATUS2));
+	dev_info(rdev->dev, "  R_000E50_SRBM_STATUS=0x%08X\n",
+		RREG32(R_000E50_SRBM_STATUS));
 	rv515_mc_stop(rdev, &save);
 	if (r600_mc_wait_for_idle(rdev)) {
 		dev_warn(rdev->dev, "Wait for MC idle timedout !\n");
@@ -453,7 +502,7 @@ int r600_gpu_soft_reset(struct radeon_device *rdev)
 			S_008020_SOFT_RESET_TA(1) |
 			S_008020_SOFT_RESET_VC(1) |
 			S_008020_SOFT_RESET_VGT(1);
-		dev_info(rdev->dev, "R_008020_GRBM_SOFT_RESET=0x%08X\n", tmp);
+		dev_info(rdev->dev, "  R_008020_GRBM_SOFT_RESET=0x%08X\n", tmp);
 		WREG32(R_008020_GRBM_SOFT_RESET, tmp);
 		(void)RREG32(R_008020_GRBM_SOFT_RESET);
 		udelay(50);
@@ -491,7 +540,14 @@ int r600_gpu_soft_reset(struct radeon_device *rdev)
 		srbm_reset |= S_000E60_SOFT_RESET_RLC(1);
 	if (G_000E50_SEM_BUSY(RREG32(R_000E50_SRBM_STATUS)))
 		srbm_reset |= S_000E60_SOFT_RESET_SEM(1);
-	dev_info(rdev->dev, "R_000E60_SRBM_SOFT_RESET=0x%08X\n", srbm_reset);
+	if (G_000E50_BIF_BUSY(RREG32(R_000E50_SRBM_STATUS)))
+		srbm_reset |= S_000E60_SOFT_RESET_BIF(1);
+	dev_info(rdev->dev, "  R_000E60_SRBM_SOFT_RESET=0x%08X\n", srbm_reset);
+	WREG32(R_000E60_SRBM_SOFT_RESET, srbm_reset);
+	(void)RREG32(R_000E60_SRBM_SOFT_RESET);
+	udelay(50);
+	WREG32(R_000E60_SRBM_SOFT_RESET, 0);
+	(void)RREG32(R_000E60_SRBM_SOFT_RESET);
 	WREG32(R_000E60_SRBM_SOFT_RESET, srbm_reset);
 	(void)RREG32(R_000E60_SRBM_SOFT_RESET);
 	udelay(50);
@@ -499,6 +555,12 @@ int r600_gpu_soft_reset(struct radeon_device *rdev)
 	(void)RREG32(R_000E60_SRBM_SOFT_RESET);
 	/* Wait a little for things to settle down */
 	udelay(50);
+	dev_info(rdev->dev, "  R_008010_GRBM_STATUS=0x%08X\n",
+		RREG32(R_008010_GRBM_STATUS));
+	dev_info(rdev->dev, "  R_008014_GRBM_STATUS2=0x%08X\n",
+		RREG32(R_008014_GRBM_STATUS2));
+	dev_info(rdev->dev, "  R_000E50_SRBM_STATUS=0x%08X\n",
+		RREG32(R_000E50_SRBM_STATUS));
 	/* After reset we need to reinit the asic as GPU often endup in an
 	 * incoherent state.
 	 */
@@ -1442,9 +1504,13 @@ int r600_startup(struct radeon_device *rdev)
 	int r;
 
 	r600_mc_program(rdev);
-	r = r600_pcie_gart_enable(rdev);
-	if (r)
-		return r;
+	if (rdev->flags & RADEON_IS_AGP) {
+		r600_agp_enable(rdev);
+	} else {
+		r = r600_pcie_gart_enable(rdev);
+		if (r)
+			return r;
+	}
 	r600_gpu_init(rdev);
 
 	r = radeon_object_pin(rdev->r600_blit.shader_obj, RADEON_GEM_DOMAIN_VRAM,
@@ -1472,9 +1538,10 @@ int r600_resume(struct radeon_device *rdev)
 {
 	int r;
 
-	if (r600_gpu_reset(rdev)) {
-		/* FIXME: what do we want to do here ? */
-	}
+	/* Do not reset GPU before posting, on r600 hw unlike on r500 hw,
+	 * posting will perform necessary task to bring back GPU into good
+	 * shape.
+	 */
 	/* post card */
 	atom_asic_init(rdev->mode_info.atom_context);
 	/* Initialize clocks */